Life-size Lego Bugatti Chiron actually works, has over 1 million pieces
https://www.cnet.com/roadshow/news/lego-bugatti-chiron-life-size/
Yes, you read that correctly, and your eyes are not deceiving you. This is a 1:1-scale Bugatti Chiron built from Lego's standard pieces with a few special bits in there to ensure functionality. Lego's team took over 13,000 work hours to put the car's 1-million-plus pieces into place, and the result is a car that actually drove under its own power. Imagine the price tag on that one.
In total, the full-size Lego Chiron relies on 339 different kinds of Lego pieces, connected entirely by traditional Lego methods, meaning no glue was used. Some pieces are custom, only because Lego didn't produce the right kinds of pieces in the right colors for this project.